Does 12-7 remind you of anything?
Halo, SD, and Havoc basically gave me the same strength gains in two weeks. If you platue naturally before any of these PH's (should not use them otherwise IMO), then if you were like me you would make about a 10-20 pound increase in major compound movements, or a two-three rep increase with same weight. best thing with two weekers is that you keep EVERYTHING! Read my log and look how quickly i recovered...and still make gains post cycle.
Does not seem like much but if you cycle once a quarter; add up your gains over a year...15-20 pounds lean mass and 50 pound gain on all major lifts. That is like newbee gains + at a rate the old body can adjust to.
After years of experimentation of AAS/PH, I find that one step forward beats three steps forward-two steps back everytime. For me, phychologically anyway.
Halo & havoc improved my look and SD gave me a more smooth-bloated look.
Hope that helps. :study: